I have a 1972 Mercury 40hp. outboard motor(Model 400). I would like to bypass the key switch that is on the controls and installa new 3 position (Ignition/Start/Battery)key switch on the console of the boat. Can this be done. The key switch and all wires in the controls are all bad. If this can be done does anyone know how the cables from the motor attach to this 3 position key switch. I would appreciate any help. I am very confused about this.
WakemIf you will post your e-mail address I will send you the wiring diagram for your motor. In answer to your ?, yes but it requres a new switch and you are better off getting a boat switch than just getting a switch from the auto parts store if you are not really electrically inclined.
My email address is wakruem@aol.com. I purchased a key switch ( 3 position ) from a localboat shop. I hope this works. Thank you very much for responding.Wayne Kruemmelwakruem@aol.com
Captain RickRick1 are you still out there. You sent me some information last year about connecting my Mecury outboard to a after marketkey switch (designed for boats). I seemed to havemisplaced the wiring diagrams that you sent me. Would it be possible to resend them. Thank you very much,Wayne
mercury outboard w/ control key switch
(Model 400). I would like to bypass the 
Linear Mode
